Boiler-tube cleaner.



IN VE N 70/? Patented Apr. 8, I902.

C. T. DEMAREST.

BOILER TUBE CLEANER.

(Application filed Apr. 22, 1901.)

(No Model.)

WITNESSES firzzezz'asmemarasi cams PETERS UNITED STATES PATENT OFFICE.

CORNELIUS T. DEMAREST, OF HACKENSAOK, NEW JERSEY.

BOILER-TUBE CLEANER.

SPECIFICATION forming part of Letters Patent No. 697,331, dated April 8, 1902.

Application filed-April 22, 1901. Serial No- 56,873. (No model.)

To all whom, it may concern: q BeitknOWnthatI,CORNELIUST.DEMAREST,

a citizen of the United States, and a resident of Hackensack, in the countyot' Bergen and State of New Jersey, have invented a new and Improved Boiler-Flue Cleaner, of which the following is a full, clear, and exact description.

The object of theinventiou is toprovide a new and improved boiler-flue cleaner which is simple and durable. in construction, very efiective in operation, and easily manipulated to thoroughly cut the soot or scale clean from the interior surface of the flue without much physical exertion on the part of the operator.

The invention consists of novel features and parts and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure lis aside elevation of the improvement with parts in section. Fig. 2 is a front end View of the same. Fig. 3 is a transverse section of the same on theline 3 3 in Fig. 1, and Fig. 4 is alike view of the same on the line 4 4: in Fig. 1.

The improved boiler-flue cleaner consists, essentially,of a bodyA, preferably made cylindrical and secured at one end to a rod B by a pin 0 or other suitable means, said rod B being adapted to be taken hold of by the operator to push the body A and the parts thereon into and through the fine to be cleaned and at the same time turn the body while moving it through the flue.

On the body A are integrally formed longitudinally-extending cutters A, preferably three in number and spaced apart, the cutters decreasing in width from the front to the rear, as will be readily understood by reference to the drawings. The forward ends A of the cutters A extend beyond the body A, and the rear ends A similarly project beyond the rear of the body, and the edges of said projecting ends A A as well as the side edges of the cutters A are formed with cutting edges, so as to readily cut into the soot or scale held on the inside of the boiler tube or flue at the time the body A is pushed through the tube or flue and turned at the same time by the operator correspondingly manipulating the rodB.

The forward and rear ends of the body A are preferably formed with radially-disposed cutters A, leading to the centers or middle portions of the projecting ends A A and the sides of said cutters A slope or taper outwardly to the peripheral surface of the body A, as indicated at A in the drawings, so that the material cut from the flue by the cutting edges of the projecting ends A and the cutting edges A readily passes rearwardly to the space between the adjacent cutters A, so as to allow a ready forward movement of the instrument without danger of clogging the tube or flue by the soot or scale cut loose during the forward movement of the body. By the arrangement described it is immaterial in which direction the body A is turned, as both sides of the cutters are provided with cutting edges. When the operator pulls the bodyA backward after it has been pushed through a tube, then the projecting and overhanging ends A come into action and clean off any scales or soot that may have been left during the forward movement of the tool through the tube or flue.

From Fig. 1 it may be seen that the cutters a being thick at their bases, convex upon their external surfaces, and tapered off sharp at their ends,are substantially tongue-shaped.

The body A, with its cutters, can be very cheaply constructed and made of cast iron or steel or other suitable material, and as it has no movable parts it is evident that it is not liable to easily get out of order.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. A flue-cleaner, comprising a horizontal head provided with a plurality of spaced outters projecting from the respective front and rear ends thereof, said cutters being braced by V-shaped webs connecting said cutters with the main body of said head, said webs being partially cut away at the rear end of said head so as to admit the end of a rod for the purpose of manipulating the head.

2. A flue-cleaner, comprising a longitudinal head provided with a plurality of substantiallytongue-shapedcutters,spaced apartand projecting from the respective front and rear ends thereof, said cutters alternating with I the said cutters at their bases beingjoined to slots which extend throughout the length of l I i the main body of the head, and the middles of said cutters standing asunder from said main body but connected thereto by webs.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CORNELIUS T. DEMAREST. Vitnesses:

WALTER B. CHRISTIE, EDWIN O. IRION.

S the head and communicate with each other by means of undercut recesses extending beneath the cutters.

A flue-cleaner, comprising a longitudinal head provided with a plurality of substantially tongue-shaped cutters projecting from the respective front and rear ends thereof, 

